<!DOCTYPE html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <title>体验css语法规范</title>
    <style>
        p {
            color: red;
            font-size: 12px;
        }
    </style>
</head>
<body>
    <p>有点意思</p>
</body>
</html>